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Analog Devices Inc./Maxim Integrated MAX6329TLUT-T
- Part No.:
- MAX6329TLUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6329TLUT-T.pdf
- Description:
- IC REG LIN POS ADJ 150MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:3,873
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Product details
Overview
MAX6329TLUT-T from Maxim Integrated is a 150mA, +3.3V fixed-output low-dropout linear regulator with integrated microprocessor reset circuit, featuring 25µA quiescent current, 180mV dropout at 100mA, and open-drain active-low RESET output. It operates from 2.5V to 5.5V input and delivers stable power with built-in thermal shutdown, short-circuit protection, and reverse leakage protection for battery-powered handheld instruments and USB devices.
For engineers reviewing the MAX6329TLUT-T datasheet, MAX6329TLUT-T pinout, MAX6329TLUT-T application, or MAX6329TLUT-T equivalent, this page provides verified technical context, exact pin functions, real-world use cases in portable electronics, and validated alternative options for supply-chain continuity and design flexibility.
Technical Context
The MAX6329TLUT-T integrates a P-channel MOSFET LDO regulator core with an independent reset supervisor using a shared 1.23V reference. Its regulator operates in preset +3.3V mode (SET = GND) and maintains ±3.0% output accuracy over 0°C to +85°C. The reset circuit monitors VOUT against a -5% threshold (2.92V min), asserts RESET low for ≥100ms after recovery, and supports no external timing components.
It includes digitally controlled active-low SHDN (reducing supply current to ≤1µA), zero reverse leakage current when VOUT > VIN, and stability with only 1µF ceramic output capacitance. Thermal shutdown activates at +160°C with 20°C hysteresis, and current limiting caps output at 350mA typical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +3.3V fixed (±3.0% accuracy over full temp/load range) |
| Max Output Current | 150mA continuous - sufficient for microcontrollers and peripheral ICs in portable systems |
| Dropout Voltage | 180mV at 100mA load - enables operation down to ~3.48V input with full 3.3V output |
| Quiescent Current | 25µA - extends battery life in always-on or low-duty-cycle applications |
| Reset Threshold | 2.92V to 3.185V (-5% of 3.3V) - ensures reliable µP reset before supply instability affects logic |
| Reset Timeout | 100ms minimum - guarantees clock oscillator and supply stabilization before processor release |
| Shutdown Current | ≤1µA - enables ultra-low-power sleep modes without external switches |
Pinout & Package
MAX6329TLUT-T is housed in a 6-pin SOT23-6 package with exposed pad for thermal dissipation. GND serves dual role as electrical reference and heatsink; recommended soldering to large PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Accepts 2.5V–5.5V supply; reverse leakage protected when VOUT > VIN |
| 2 GND | Ground reference & thermal path | Must connect to PCB ground plane for thermal management and noise immunity |
| 3 SHDN | Active-low shutdown control | Pull low to reduce total supply current to ≤1µA; tie to IN for normal operation |
| 4 RESET | Open-drain active-low reset output | Sinks 3.2mA max; requires external pullup; asserts during power-up/brownout |
| 5 SET | Feedback voltage selection | Grounded for +3.3V fixed output; connects to resistor divider for adjustable mode |
| 6 OUT | Regulated output | Delivers up to 150mA; bypass with ≥1µF ceramic capacitor at pin |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reset supervisor | Eliminates need for discrete RC timer or external supervisor IC - reduces BOM count and board area |
| Zero reverse leakage current | Enables seamless backup battery switchover without external blocking diodes or power-path complexity |
| 1µF minimum output capacitance | Supports compact designs using small ceramic capacitors - avoids bulky tantalum or high-ESR types |
| Thermal + short-circuit protection | Self-protects under fault conditions - no external current-sense or thermal monitoring required |
| SHDN-controlled ultra-low power mode | Reduces system standby current to sub-µA level - critical for coin-cell or energy-harvesting applications |
Applications
| Hand-Held Instruments | USB Devices |
|---|---|
Use Scenario: Portable multimeters and data loggers powered by single Li-ion or AA cells. IC Role / Device Role / Timing Role: Primary 3.3V power rail generator and power-on reset initiator for MCU and ADC subsystems. Use Value: 25µA quiescent current extends battery runtime; 100ms reset timeout ensures stable ADC reference before sampling begins. | Use Scenario: Self-powered USB peripherals such as HID keyboards or firmware-upgradable dongles. IC Role / Device Role / Timing Role: Regulates VBUS-derived 5V down to clean 3.3V and asserts RESET until VDD stabilizes post-connection. Use Value: Open-drain RESET interfaces directly with USB controller reset pin; 180mV dropout allows operation even as VBUS sags near 4.5V. |
| Palm Top Computers | PCMCIA Cards |
Use Scenario: Legacy PDAs with tight space constraints and multi-rail power sequencing requirements. IC Role / Device Role / Timing Role: Supplies 3.3V I/O rail and coordinates reset assertion with main CPU power-up sequence. Use Value: SHDN pin enables synchronized power-down of companion ICs; ±3% regulation meets JEDEC JESD8-7B I/O voltage tolerance. | Use Scenario: Hot-pluggable PCMCIA memory or modem cards requiring immediate power validation. IC Role / Device Role / Timing Role: Provides regulated 3.3V and generates hardware reset pulse upon card insertion detection. Use Value: 100ms minimum reset duration satisfies PCMCIA 2.0 specification tRP requirement for host controller initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6328TLUT-T | Same pinout and package; uses -10% reset threshold (2.75V–3.02V) instead of -5% | Preferred where tighter brownout detection is needed before system lockup occurs | Select MAX6328TLUT-T if system requires earlier reset assertion at deeper supply droop |
| TPS3808G33DBVR | Separate reset IC + external LDO; 3.3V fixed output; 350ms reset timeout; no SHDN pin | Requires additional regulator but offers higher reset accuracy (±0.5%) and longer timeout | Choose TPS3808G33DBVR when extended reset hold time or tighter reset threshold tolerance is mandatory |
Compared with MAX6329TLUT-T, MAX6328TLUT-T provides earlier reset activation under brownout, while TPS3808G33DBVR trades integration for higher reset precision and longer timeout - both require layout changes and do not share SHDN functionality.
Availability
MAX6329TLUT-T is available at Aetrix Electronics and suitable for hand-held instruments, USB devices, and PCMCIA cards requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MAX6329TLUT-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, medical, and portable electronics.
The MAX6329 family targets battery-powered systems needing highly integrated, ultra-low-quiescent-power voltage regulation with guaranteed reset timing - optimized for space-constrained, cost-sensitive portable equipment.
FAQ
What is the exact reset threshold voltage range for MAX6329TLUT-T?
The MAX6329TLUT-T features a -5% reset threshold relative to its +3.3V output, specified from 2.92V to 3.185V at +25°C. This threshold tracks output voltage variation and remains within ±3% accuracy over temperature and load. The device asserts RESET low whenever VOUT falls below this window and holds it for ≥100ms after VOUT recovers above the threshold - ensuring robust power-on sequencing for microprocessors.
Does MAX6329TLUT-T support adjustable output voltage?
No, MAX6329TLUT-T is factory-configured for fixed +3.3V output. Its SET pin must be connected to GND to enable this preset mode. While the MAX6329 family supports adjustable outputs via external resistors on other variants (e.g., MAX6329WLUT-T), the TLUT-T suffix specifically denotes the +3.3V/-5%/open-drain RESET version with internal feedback. Using SET for voltage adjustment on MAX6329TLUT-T will result in undefined regulation behavior.
What is the minimum output capacitor required for stable operation of MAX6329TLUT-T?
MAX6329TLUT-T requires a minimum 1µF ceramic output capacitor (X7R or X5R dielectric) placed directly at the OUT pin for guaranteed stability across 0°C to +85°C and up to 150mA load. Larger values (e.g., 10µF) improve transient response and PSRR. Z5U/Y5V dielectrics may require ≥2.2µF below -10°C. Input bypassing with a 1µF capacitor between IN and GND is also recommended to suppress line noise.
Can MAX6329TLUT-T be used with input voltages below 2.5V?
No, MAX6329TLUT-T has a specified input voltage range of 2.5V to 5.5V. Operation below 2.5V violates Absolute Maximum Ratings and results in unregulated output, undefined reset behavior, and potential failure to start up. At VIN = 2.5V, dropout margin is exhausted for +3.3V output - the device cannot maintain regulation. For sub-2.5V inputs, consider dedicated low-input LDOs such as the MAX1725 or AP2112.
How does the SHDN pin function on MAX6329TLUT-T, and what happens to RESET during shutdown?
The SHDN pin on MAX6329TLUT-T is an active-low digital control that disables the regulator core and reduces total supply current to ≤1µA. During shutdown, OUT drops to 0V, causing the internal reset comparator to detect undervoltage - thus asserting RESET low. RESET remains low throughout shutdown and for ≥100ms after SHDN is released and VOUT recovers, ensuring downstream logic resets cleanly on wake-up.
MAX6329TLUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.23V (3.3V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.36V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 50 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Reset
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6329TLUT-T FAQ
1.How can I place an order for MAX6329TLUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6329TLUT-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6329TLUT-T reliable?
The price and inventory of MAX6329TLUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6329TLUT-T is usually 5 days.
3.What payment methods are accepted for MAX6329TLUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6329TLUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6329TLUT-T?
MAX6329TLUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6329TLUT-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6329TLUT-T?
For technical support, including MAX6329TLUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6329TLUT-T requirements.
6.How does Aetrix verify that MAX6329TLUT-T is sourced from the original manufacturer or authorized distributors?
All MAX6329TLUT-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6329TLUT-T meets industry standards.
7.What is the process for return or replacement of MAX6329TLUT-T?
All MAX6329TLUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6329TLUT-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6329TLUT-T part is unused and in its original packaging.
Return procedure for MAX6329TLUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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